Infested Oaks are Floral counterparts for Zerg Hatcheries.

Floral Zerg Larva can attack by using its own movement speed and its barbed backside against its target. Also, they can already burrow which in right moment leads to eating and infesting a seed of plants they find.

Infested Palms are Floral counterparts for Zerg Spires.

(Zerg Larva belongs to Blizzard)